Split out audio debug recording from RenderProcessHostImpl.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index c24ed13c5d31ca48ff5520b6a40615ebfdd734f2..e2d5e8242751cbcd85e17a54049dbbab7bbc65b4 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -97,7 +97,7 @@
 #include "content/renderer/input/input_event_filter.h"
 #include "content/renderer/input/input_handler_manager.h"
 #include "content/renderer/input/main_thread_input_event_filter.h"
-#include "content/renderer/media/aec_dump_message_filter.h"
+#include "content/renderer/media/audio_debug_recorder.h"
 #include "content/renderer/media/audio_input_message_filter.h"
 #include "content/renderer/media/audio_message_filter.h"
 #include "content/renderer/media/audio_renderer_mixer_manager.h"
@@ -611,9 +611,7 @@ void RenderThreadImpl::Init() {
 
   webrtc_identity_service_.reset(new WebRTCIdentityService());
 
-  aec_dump_message_filter_ = new AecDumpMessageFilter(
-      GetIOMessageLoopProxy(), message_loop()->task_runner());
-  AddFilter(aec_dump_message_filter_.get());
+  audio_debug_recorder_ = new AudioDebugRecorder(GetServiceRegistry());
 
   peer_connection_factory_.reset(new PeerConnectionDependencyFactory(
       p2p_socket_dispatcher_.get()));